Mill foe



OLIVER WRIGHT, or RooHEsTEn, NEW roEK.

MILL FOR SAWING IRREGULAR FORMS.

Specification of Letters Patent No. 7,011, dated January 8, 18,50.

To all whom z' may concern Be itknown that I, OLIVER WRIGHT, of

Rochester, in the county of Monroe and State of New York, have inventeda new and useful Improvement in the Machine for Sawing Ship-Timber andfor other Purposes, which is described as follows, refer ence being hadto the annexed drawings of the same,'making part of this specification,in Which- Figure l, is a Side elevation of the machine, Fig. 2, is afront elevation of the same, Fig` 3, is a view of the back part ofditto, Fig. 4c, is a horizontal section of the back part of the same, atthe line ai, m, of Fig.l 3, showing the cogged gearing, for moving thetable, on which the timber 1s placed, and a top view of said table, andFig. 5, is a section of the table and index plate.

Similar letters in the Several figures, refer to corresponding parts.

rIhe nature of this invention and improve'- ment consists, in securingthe saw' in an inclined sliding frame, and arranging at the lower partof the same, a vibra-ting table or platform, having segmental plates orbars secured to its lower surface, by screws passing through slotsformed in the same, the lower edges of which plates or bars rest onfriction rollers, turning in the frame of the machine, over which theyare moved by a combination of bevel cog wheels, screw and other shafts,bands and pulleys, in such a manner as to cause the surface of the tableor platform to assume any required angle, with the line on which the sawmoves, in order to give a corresponding bevel or miter to the timberbeing sawed, and to admit of the table, being raised or lowered on thesegmental plates or bars. to accommodate itself to any thickness oftimber, so as to always keep the center, of which the segmental platesor bars forms the arcs of circles, on a line with the line upon whichthe saw moves, and midway between the upper and lower surfaces of thetimber being sawed, to prevent the saw, binding on its sides.

To enable others skilled in the art to make and use myk invention, Iwill proceed to describe its construction and operation.

A is the frame, made of suitable size, strength and material, consistingof two side timbers raised at their back parts and connected together attheir ends, by suit able timbers, and supported on four posts;

B is an inclined frame, composed of two parallel timbers secured attheir lower ends to the frame A, so as to incline over the back part ofthevsame at an angle of about degrees, with a horizontal plane, andconnected together by cross timbers (a) above and below;

C is an oblong cast iron frame, secured on 55 the side of one oftheinclined timbers of: the frame B, and having a curved arm projectingfrom its front edge, near its center, and straight arms (c) projecting,one from its lower part and the other above the same,

the upper one of' which extends forward a like distance from theinclined frame B with the curved arm and both having blocks of wood (d),secured on their sides at their forward ends, having slits made in theirfaces, in which the saw moves, for guiding the same;

D are round inclined guides, secured to projections formed at the vupperand lower ends of the metallic frame C, and running 30 parallel thereto,one being beyond the forward edge and the other at the back edge of thesame, and both running its full length. E is another round inclinedguide, secured to the arms (c), projecting from the metallic frame nearthe outer ends of the same, and extending from one to the other,parallel to the guides D.

F is a sliding frame having boxes on its sides, which surround and moveover the inclined guides D, E. This frame consists of two parallelAtimbers or bars F, connected together at top and bottomvby ties (e),which extend outward the same distance beyond the inclined frame B asthe bars or rr slit to receive the ends yof the saw (gv),

which are inserted in the same and keyed by pins passing throughopenings in the saw, and resting against the inner surfaces of saidboxes (7)-the tension of said saw being regulated by a screw (Z) passingthrough the upperpart ofl the upper box; and pressing against thesurface of the upper tie (e).

G is a vibrating table or platform upon l which the timber to be cut isplaced, having a recess formed in its back edge, and provided withribbed plates secured t0 near the sides of its lower surfaces andparallel to the same, the ribs of which plates project a sufficientdistance from their lower surfaces to admit of slots (i), running atright an les thereto, being formed near their ends, su ciently long toadapt the table to the different sized timber to be cut.

H are segmental plates or bars placed on edge, and secured at theirextremities, to the sides of the ribs of the plates (it), by means ofscrews (10) passing through the slots in the ribs, and entering femalescrews in the segmental bars or plates, their heads binding on thesurface of the ribs.

I are friction rollers, having grooves in,

their peripheries, in which the segmental plates-H rest and move, theaxles of which rollers turn in ears raised from metallic plates, securedto the upper surfaces of the `side timbers of the frame-other rollers(l1) turning on shafts or studs projecting from projections or ears,rising from said metallic plates, are arranged above the upper edges ofthe segmental -bars or plates,

Iand bearing against the same midway between the rollers I, for keepingsaid segmental plates or bars in their places duringy their movements.

J is a bent bar, secured to the side of the recess formed in the tableor platform, and

extended upward and forward and over the same, to beyond its center,being provided at near its forward end with right angled levers turningin fulcrums at their bend or apex, between ears, projecting from saidbent bar J, and widened at their lower ends, .and curved eccentric withthe centers upon which they move, in such a manner as to adapt theirlower surfaces to the upper surfaces of any thickness of timber, as itis passed over the table, and prevent its being raised from the sameduring the upward movement of the saw; the gravity of the other ends ofthe said levers, causing their curved surfaces to be always kept incontact with the timber.

K are rollers turning in boxes in the square opening in the table,through which the saw passes, the peripheries of which project a slightdistance above the surface of the table, for facilitating the passage ofthe timber over the same.

L are projections formed on the inner sides of the segmental plates, orbars, mid- -Way between their ends, having recesses in their lowersurfaces in which are placed -rectangular blocks of metal or nuts (7c),

turning on axles in said projections L, and

-h'aving female screws formed in them, in

which work screw shafts (Z) passing through the same, and running to theback part of bevel cog wheels (m m), at their back parts, the bevelwheel (m) on one, bein situated slightly in advance of the beve wheel(m) on the opposite one, and meshing in gear with the front part of asimilar sized bevel cog wheel (n), on the extremity of a horizontalshaft (o), running parallelr to the back part of the frame A, and fromone screw shaft (Z), to the other, while the bevel wheel (m), meshes ingear Withrthe 'back part of another bevel cog wheel (p), on

M, in a curved direction, to near the topof the enlarged part of theframe, where it is attached to the end of av lever (1*), by its end,which is ro-unded, being inserted through an opening in the same,extending horizontally through a slot to the outside of the frame, beingprovided at its outer end with a handle, and turning on a fulcrum at itscenter, said fulcrum being fixed permanently to the frame A.

N is a bevel cog Wheel, secured on the movable end of the horizontalshaft M, and capable of being made to engage with either the back partof therbevel cog wheel (m), on one of the screw shafts, or with a bevelcog wheel (s), on the extreme end of said screw shaft Z, by moving thelever (1) in order to reverse the motion of the screw shaft, andconsequently the movement of the table or platform.

O is a segmental plate,whose arc forms a quarter of a circle, graduatedon its face with marks and figures, indicating degrees, curving upwardover the table through the recess formed in the back part of the same,and secured at its lower end to a horizontal metallic bar (t), extendingunder the table to one of the metallic segmental plates, or bars H towhich it is firmly secured. The upper end of this segmental bar issituated immediately over the center of the table or platform, and itsupper part passes through a slot formed in thewfront part of a plate(n), secured to one of the timbers of the inclined frame B, so that assaid segmental plate passes through said slot inthe sharpened edge oftheplate von the side ofthe same, the angle formedby the saw with thesurface will be indicated by saidsharpened edgeA of the plate, pointingto the corresponding degree von the graduated'plate O.

nl? is a vertical shaft turning in boxes in the raised .part of theframe A, and near one side of the same, having a shoulder, which restson the lower box to prevent it descending, and a wheel and handle (o),at its upper end, above the frame, by which it is'revolved, and providedwith a bevel cog lwheel (fw), at its lower end, which meshes in gearwith the bevel cog wheel on the end of the screw shaft, for givingmotion to the screw shafts, when it is desired Vto give an irregular orquick motion to the spring bar fr from the notched bar Q.

R is a drum of the form of a frustum of a cone, secured on thehorizontal shaft 1M, near its stationary end, around which drum ispassed a band (8), leading upward and extending over another drum (y) ofa similar size and form to the drum R, but arranged in a'reversedposition to the saine-the larger end of the upper one,

v being over the smaller end of the lower one,

and vice versa, said upper drum (y), bein secured on a horizontal shaftturning in boxes, in the back part'of the inclined frame B. The designin having these drums R, (y), of the form represented, is to move theband over the surfaces of the same toward either end, to regulate thespeed of the movement of the table or platform.

S is a pulley, secured on the same shaft as the upper drum (y), and nextthe large end of the same around which is passed a band (z), extendingupward and passing around a horizontal shaft (2), turning in boxes atthe top of the inclined frame B, on one end of which is secured a flywheel (3), having a wrist on its side, to which is attached the end of aconnecting rod (4),

extending downward, and attached at its lower end to a pin projectingfrom the lower tie (e) of the sliding frame F. This shaft (2) isprovided with a tight and loose pulley (5, 6), around which may bepassed a band leading to any convenient motive power, and a crank (7) atits end, for turning the same.

The mode of operation is as follows: When it is desired tosaw timber atone uniform bevel or miter, the lever (1') will be moved so as to bringthe bevel cog wheel N, on the end of the shaft N midway between t-hebevel cog wheels (m, 8,) so as to prevent the screw shafts (Z) and tableGr from being moved. The table or platform G being brought to the properangle in relation to the saw (g) and then raised or lowered as t-hecasemay be, from or toward the seg'- mental plates or bars H in order tobring the center of the timber to be sawed-that is a line midway betweenits upper and lower surfaces, -on a line with a center point, of whichsaid segmental plates or bars H form arcs of circles, which center pointis intersected by t-he saw: and the table or platform, being clamped tothis position, by the screws (l0) passing through the slots ingcorresponding female screws in the segmental plates or bars ;-motion iscommunicated to -the shaft at the upper part of the inclined frame B bythe application of horse steam or water powery to the drum (5) on thesame, or to the crank (7) which will cause the sliding frame F, with thesaw to Ibe moved up and down over the inclined slides D, E, by theconnecting rod 4. The timber is then placed on the table or platform Gr,immediately in fro-nt of the saw and is forced toward the same by handor other power, passing over the rollers K, which facilitate itsprogress, and under the eccentric surfaces of the right angled'levcrswhich preventit from being raised by the upward movement of the saw,until it is sawed the required length.

In case it is desired to saw the timber to a curvilinearform the crank oand upright shaft P, to which it is attached, is turned either to theright or left, so as to turn the screw shafts (Z) by means of the bevelcogged gearingthe one to the right and the other to the left, so as tobring the upper surface of the table Gr to the required angle inrelation to the line upon which the saw moves, which is to form thebevel or miter of the commencement of the curve, as indiin the ribs onthe plates and enteri (a) and the graduated segmental bar O,

say for instance, that the bevel or miter of the commencement of the cutof the saw through the timber, is to form an angle of five degrees withperpendicular line, and that the angle is to be gradually and equallyincreased five degrees in every live feet the saw passes through thetimber. The operator will turn the crank until the degree marked on thegraduated segmental plate or bar O, stated above, is brought oppositethe sharpened edge of the plate (u) and will force the outer end of thelever (1') back so as to bring the bevel cog wheel N, on the end of theshaft M in gear with the bevel cog surface of the wheel (m) so as tocause the screw shafts (Z) to be turned one to the left and the other tothe right, when motion is given to the machine to give the requiredmovement to the table or platform, and will moreover move the band 8over the surfaces ofthe drums R (y) of the form of a frus-` tum of acone, until the relative diameters of the parts of said drums over whichsaid band passes, will in. his judgment give the required degree ofspeed suited to the speed with which the timber is fed to the saw.

The timber previously marked with transverse lines, and the line uponwhich the saw is to out, will then be moved past the saw as beforestated,-the operator being careful to observe that the movements of thegraduated segmental plate O, past the sharpened edge of the plate (u)and the movement ofthe timber toward the saw shall correspond with thecurvilinear form to be given to the timber,-or in other Words, that therelative speeds ofthe timber and table in relation to the saw shallbesuch as to give an increase of bevel or miter to the ytimber of fivedegrees in every five feet of its progress toward the saw.

By raising the table or platform G from' the segmental plates or bars H,so as to make its upper vsurface conform with the thickness'of thetimber to be out, by means of the screws (10) passing through the slots(z') in the ribs (h) and entering said segmental lplates or bars H asbefore stated, the saw saw an irregular curve,'-'that is,-a curvilinearsurface partly beveling on its surface, any number of degrees on oneside of a perpendicular line and beveling any 'ven number of degrees onthe opposite si e of the said perpendicular, the operator moves thehandle of the lever (r) forward, and disengages the bevel co Wheel N.from the two bevel wheels (m, s, on the screw shaft and after settingthe table to the proper angle in relation to the saw, required for thecommencement of the bevel on the timber, gives motion to the machine andforces the timber against the saw and at the same time turns the crankshaft P either way to move the table to the proper angle with the saw tocut the timber to the required bevel as it passes the same.

The mode of raising and lowering the table or platform G on thesegmental plates or bars H, for adapting the same to any thickness oftimber to be cut, and keeping the middle of the timber, between its topand bottom,l always in a line with the center OLIVER WRIGHT.

TWitnesses EDWIN BROWN, MATTHIAS Moor.

